This is my home internet over wifi

When at home I post shite on the internet whilst watching shite on the internet some netflix but mostly youtube

This is my clients home internet over wifi-

I did him 3 x ruijie access points & ruijie poe router

Moans that call of duty is slow,

Internet says , "a minimum of 100 Mbps download and 10 Mbps upload is recommended"

I may be able to get the ISP to tinker but I think he's moaning for the sake of moaning

The ping is a litttle high, not a gamer so cant comment. Also the upload latency is high, google says it's "buffer bloat" and to check your router

Mine, ping is usually around 6ms

Bufferbloat would be my first thought.

You can see the outbound ping is high underload and the "game" test is 4/5

Could look at QoS stuff on the kit you fitted?

At home I have super fast up and download speeds, at work its abismal there is fibre in the street to the residents up the road, but they wont bring it onto our estate because there is a printer with a rented line and a stonemason with a rented line both paying £600ppm upwards (I could share but I dont want them on our network) We currently have a 3 mobile router for internet only but its no good for the 3cx because its not got a fixed IP. I may look at starlink if fibre doesnt happen soon